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x/ramda/test/defaultTo.js

:ram: Practical functional Javascript
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var R = require('../source');var eq = require('./shared/eq');
describe('defaultTo', function() {
var defaultTo42 = R.defaultTo(42);
it('returns the default value if input is null, undefined or NaN', function() { eq(42, defaultTo42(null)); eq(42, defaultTo42(undefined)); eq(42, defaultTo42(NaN)); });
it('returns the input value if it is not null/undefined', function() { eq('a real value', defaultTo42('a real value')); });
it('returns the input value even if it is considered falsy', function() { eq('', defaultTo42('')); eq(0, defaultTo42(0)); eq(false, defaultTo42(false)); eq([], defaultTo42([])); });
it('can be called with both arguments directly', function() { eq(42, R.defaultTo(42, null)); eq('a real value', R.defaultTo(42, 'a real value')); });
});